( S )-2-硝基-6-取代的6,7-二氢-5 H-咪唑并[2,1- b ][1,3]恶嗪类化合物由于其优异的性能而被广泛探索作为新型抗结核药物的潜在用途。结核分枝杆菌需氧全细胞的杀菌特性. 有氧活性需要咪唑环 2-位上的氧原子。在这里,我们表明用氮或硫取代这种氧会产生等效的类似物。酰化氨基系列、氧化硫醚或用碳取代醚氧显着降低了化合物的效力。用氮替换 6 位的苄氧稍微提高了效力,并促进了对更易溶的 6-氨基系列中 SAR 的探索。通过在 6-( S ) 位置和末端疏水性芳族取代基之间扩展接头区域,实现了效力的显着改进。一个简单的四特征 QSAR 模型被推导出来合理化这一系列双环硝基咪唑的 MIC 结果。
( S )-2-硝基-6-取代的6,7-二氢-5 H-咪唑并[2,1- b ][1,3]恶嗪类化合物由于其优异的性能而被广泛探索作为新型抗结核药物的潜在用途。结核分枝杆菌需氧全细胞的杀菌特性. 有氧活性需要咪唑环 2-位上的氧原子。在这里,我们表明用氮或硫取代这种氧会产生等效的类似物。酰化氨基系列、氧化硫醚或用碳取代醚氧显着降低了化合物的效力。用氮替换 6 位的苄氧稍微提高了效力,并促进了对更易溶的 6-氨基系列中 SAR 的探索。通过在 6-( S ) 位置和末端疏水性芳族取代基之间扩展接头区域,实现了效力的显着改进。一个简单的四特征 QSAR 模型被推导出来合理化这一系列双环硝基咪唑的 MIC 结果。
Visible-light promoted oxidative cyclization of cinnamic acid derivatives using xanthone as the photocatalyst
作者:Bin Zhao、Bo Xu
DOI:10.1039/d0ob02417a
日期:——
coumarin derivatives via a tandem double bond isomerization/oxidative cyclization of cinnamic acids. Inexpensive and stable xanthone was used as the photocatalyst, and readily available Selectfluor was used as the oxidant. This method tolerates a wide range of functional groups and offers excellent chemical yields in general. Besides, the photocatalytic oxidative cyclization of cinnamic acid esters gives
One-pot stereoselective synthesis of α,β-differentiated diamino esters via the sequence of aminochlorination, aziridination and intermolecular S<sub>N</sub>2 reaction
作者:Yiwen Xiong、Ping Qian、Chenhui Cao、Haibo Mei、Jianlin Han、Guigen Li、Yi Pan
DOI:10.3762/bjoc.10.189
日期:——
We report here an efficient one-pot method for the synthesis of alpha,beta-differentiated diamino esters directly from cinnamate esters using N,N-dichloro-p-toluenesulfonamide and benzylamine as nitrogen sources. The key transformations include a Cu-catalyzed aminohalogenation and aziridination, followed by an intermolecular SN2 nucleophilic ring opening by benzylamine. The reactions feature a wide
Hydropyridylation of α,β-Unsaturated Esters through Electroreduction of 4-Cyanopyridine
作者:Hua-Jian Zhou、Jing-Mei Huang
DOI:10.1021/acs.joc.2c00177
日期:2022.4.15
A mild and highly efficient method for the hydropyridylation of α,β-unsaturatedesters has been developed. This protocol provides the products smoothly with a wide substrate scope in an undivided cell under ambient conditions. Moreover, studies showed that the scope could be extended to other unsaturated compounds, including enones and aldehydes.